Troubleshooting (continued)
If IQ Boiler Control Shows Status Code “STA 15": The IQ Boiler Control is “Waiting for Limit to Close” and the display on the IQ Option Panel should be the first place to check. The IQ Option Panel display (lower display) will show one of the following status codes:
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| IQ Option Panel Display Shows “ERR" |
| Display | Status | Boiler / Control Action(s) | |
Err |
| 1 | Low Input Voltage | AC voltage is too low |
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| Whenever a new IQ Option Card is first installed into the IQ Option Panel, the IQ Option |
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| Panel automatically “Learns” the card. This means it detects the specific card and lists |
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| it as a card number (C1, C2, or C3). However, to help avoid errors or unauthorized |
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| IQ Option Card | option card changes, once an IQ Option Card is initially installed, the IQ Option Panel |
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| will not automatically “Learn” a different card in the same slot. In this situation, the IQ | |
Err |
| 2 - card # | Type Change | |
| Option Panel has to “Learn” about the new card manually. To have the IQ Option Panel | |||
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| without | |
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| recognize or “Learn” about a different card, the user must press the “I” key on the IQ | |
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| Option Panel until “Lrn” is displayed. Then press and hold either the Up ñ or Down ò |
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| key for at least three (3) seconds. The IQ Option Panel will then recognize and “Learn” |
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| the new IQ Option Card. |
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| IQ Option Card | The IQ Option Card is not installed properly or has an internal fault. Remove the card |
Err |
| 3 - card # | Communications | and check for bent IQ Option Panel card interface pins. Straighten bent or misaligned |
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| Error | pins or choose another card slot and reinstall card. If problem persists, replace card. |
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| IQ Option Card | The IQ Option Card is not installed properly, there is a option card or IQ Option Panel |
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| fault. Remove the card and check for bent IQ Option Panel card interface pins. | |
Err |
| 4 - card # | Hardware | |
| Straighten bent or misaligned pins or choose another card slot and reinstall card. If | |||
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| Interface Error | |
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| problem persists, replace card. | |
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Err |
| 5 | Limit Output OFF | Check limit string wiring, replace the IQ Option Panel. |
| in ON State | |||
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Err |
| 6 | Incorrect Wiring | Check boiler wiring. |
Err |
| 7 | Limit Output ON | Check limit string wiring, replace the IQ Option Panel. |
| in OFF State | |||
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Err |
| 8 | Internal IQ Option | Replace the IQ Option Panel. |
8 |
| Panel Error | ||
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If IQ Option Panel Display Shows “OL": The OL- “card number” indicates the card slot causing the Open Limit. For example,
For example, if, while the boiler has a Heat Request, and the Aquastat IQ Option Card installed in Slot 1 has a sensor failure the IQ Option Panel displays
1.Press the “I” key on the IQ Option Panel. The display will go from
2.When the display shows C1, press either the Up ñ or Down ò keys to switch the display to show the view mode of the Aquastat Limit Control IQ Option Card inserted in Slot 1. The display will now read Err
3.Check the sensor connections and when required replace the sensor.
4.When the sensor failure is corrected the IQ Option Panel will return to the “O.C.P" display and the IQ Boiler Control start sequence will continue.
For additional information refer to the instruction manual supplied with the IQ Option Card.
If IQ Option Panel Display Shows “O.C.P": The Option Panel is in normal run or operating mode, the IQ Option Panel display will show “O.C.P" (Option Card Panel) along with a floating decimal point that flashes on and off (the “heartbeat” flash indicating the panel is functioning properly and there are no open limits or errors). The Option Panel or the card installed in the option panel are not causing the open limit.
1.Check for loose boiler wiring and check flame roll out & blocked vent switches.
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